All Patents in class 228/30


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All Patents in class 228/30
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	331,527	Dec. 01, 1885	C.W. Nason	Machine for Welding Plugs in the Ends of Tubes
	1,282,163	Oct. 22, 1918	N.D. Abbey	Welder